Cash shops only influence RMT when the items are not bound to the purchaser and are desirable to trade.

It's likely that SE will make cash shop fluff bound to the character that retrieves it. Allowing players to turn around and sell the items for gil would be a sanctioned form of RMT. I don't really care either way since people who want to do RMT try to do it regardless, and gil is a fairly worthless currency that, aside from Novus and crafter melds, buys almost nothing of actual gameplay value, but they probably won't want to go there.